corona definition astronomy
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- coronal hole. noun, Astronomy. 1. a part of the solar corona that appears dark on optical and x-ray images and is characterized by low temperature and low density. Origin of coronal hole.
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solar eclipse The definition of a solar eclipse is when the moon blocks out sun. An example of a solar eclipse is when people cannot see the sun during the day. Noun. (plural solar eclipses) (astronomy) A phenomenon occurring when the Moon passes between the Earth and the sun.
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Eclipse An eclipse is an astronomical event that occurs when an astronomical object is temporarily obscured, either by passing into the shadow of another body or by having another body pass between it and the viewer.
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umbra Astronomy. 1  the complete or perfect shadow of an opaque body, as a planet, where the direct light from the source of illumination is completely cut off. Compare penumbra (def 1a). 2  the dark central portion of a sunspot. Compare penumbra (def 1b).
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coronal cor·o·nal. n. 1. A garland, wreath, or circlet for the head. 2. Linguistics A coronal consonant.adj. 1. Of or relating to a corona, especially of the head. 2. Of, relating to, or having the direction of the coronal suture or of the plane dividing the body into front and back portions.3. Linguistics Articulated by raising the blade of the tongue, as (t) in tip and (n) in night.. coronal-flower arrangement consisting of a circular band of foliage or flowers for ornamental purposes. chaplet, lei, wreath, garland. crown-a wreath or garland worn on the head to signify victory.
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- What does CORONA mean? Definitions for CORONA kəˈroʊ nə Here are all the possible meanings and translations of the word CORONA.
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Astronomy Astronomy is a natural science that studies celestial objects and phenomena. It applies mathematics, physics, and chemistry, in an effort to explain the origin of those objects and phenomena and their evolution. Objects of interest include planets, moons, stars, galaxies, and comets; the phenomena include supernova explosions, gamma ray bursts, and cosmic microwave background radiation. More generally, all phenomena that originate outside Earth's atmosphere are within the purview of astronomy. A
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- The Corona I believe. You should check a diagram of the sun as well. The parts of the sun's atmosphere from the surface outward are the photosphere, the chromosphere, the corona, and the outer layers of the corona called the solar wind. The photosphere is the visible part of the Sun's atmosphere.
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Corona The word corona is a Latin word meaning crown, from the Ancient Greek κορώνη (korōnè, “garland, wreath”). The high temperature of the Sun's corona gives it unusual spectral features, which led some in the 19th century to suggest that it contained a previously unknown element, coronium.
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- ‘But the corona owes its origin to diffraction rather than refraction.’ ‘Another effect that is caused by the interaction of the sun and water droplets, is the corona.’ ‘A circle around the sun or moon that is smaller than a halo with a 22-degree radius, is probably a corona.’
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- Click on image for larger version. The Corona is the Sun's outer atmosphere. It is visible during total eclipses of the Sun as a pearly white crown surrounding the Sun. The corona displays a variety of features including streamers, plumes, and loops.
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corona The luminous, irregular envelope of gas outside the chromosphere of a star. The Sun's corona is composed of ionized gas between approximately 1,000,000°K and 2,000,000°K and has an extremely low density. This phenomenon is visible only during a solar eclipse.
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- Astronomers use astronomical units – or AU – to describe solar system distances. Definition of AU here. Also, mean distances in AU to prominent solar system objects. Earth and the sun, as viewed by the Space Shuttle Discovery. An astronomical unit is the average distance between these two bodies in space.
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Sky The sky (or celestial dome) is everything that lies above the surface of the Earth, including the atmosphere and outer space. In the field of astronomy, the sky is also called the celestial sphere. This is viewed from Earth's surface as an abstract dome on which the Sun, stars, planets, and Moon appear to be traveling. The celestial sphere is conventionally divided into designated areas called constellations.
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Star A star-forming region in the Large Magellanic Cloud, an irregular galaxy. Astronomy (from Greek: ἀστρονομία) is a natural science that studies celestial objects and phenomena. It applies mathematics, physics, and chemistry, in an effort to explain the origin of those objects and phenomena and their evolution.
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- SOHO is a space-based Observatory is viewing and investigating the Sun from its deep core, through its outer atmosphere - the 'corona' - and the domain of the solar wind, out to a distance ten times beyond the Earth's orbit.
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Space Environment The solar wind is caused by the hot solar corona, which is the outermost layer of the solar atmosphere, expanding into space. The corona is the rim of the Sun that is visible to the naked eye during a solar eclipse.
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astronomy A large assemblage of stars, nebulae, and interstellar gas and dust. In a spiral galaxy, a localized region in which matter piles up as it orbits the center of the galaxy; this is a proposed explanation of spiral structure. spin. spiral arms. Lanes of interstellar gas, dust, and young stars that wind outward in a plane from the central regions of a galaxy.
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Nebula A nebula (Latin for cloud; pl. nebulae, nebulae, nebulæ or) nebulas is an interstellar cloud of, dust, hydrogen helium and other ionized. Gases, originally nebula was a name for any diffuse astronomical, object including galaxies beyond The Milky. wayne of the best examples of this is the Crab Nebula, in Taurus. The supernova event was recorded in the year 1054 and is labelled SN 1054. The compact object that was created after the explosion lies in the center of the Crab Nebula and is a neutron star. Other nebulae may form as planetary nebulae.
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corona 2. (Astronomy) Also called: aureole the outermost region of the sun's atmosphere, visible as a faint halo during a solar eclipse. 3. (Architecture) architect the flat vertical face of a cornice just above the soffit. 4. something resembling a corona or halo.
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Corona discharge Corona discharge on a Wartenberg wheel. A corona discharge is an electrical discharge brought on by the ionization of a fluid such as air surrounding a conductor that is electrically charged. Spontaneous corona discharges occur naturally in high-voltage systems unless care is taken to limit the electric field strength.
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Astronomical unit The astronomical unit is too small to be convenient for interstellar distances, where the parsec and light-year are widely used. The parsec (parallax arcsecond) is defined in terms of the astronomical unit, being the distance of an object with a parallax of 1 arcsecond.
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Astronomy X-ray astronomy is the study of astronomical objects at X-ray wavelengths. Typically, X-ray radiation is produced by synchrotron emission (the result of electrons orbiting magnetic field lines), thermal emission from thin gases above 10 7 (10 million) kelvins, and thermal emission from thick gases above 10 7 Kelvin.